First, I must acknowledge the FPT Media managers and staffs of their contribution by participating in the interviews, giving much appreciated information about their organizations, which suggested me thinking about this interest topic.

Secondly, I would like to thank to my boss and colleagues in Cross join stock company that you bring me a very amazing condition in the long way of doing this work.

I would like to express my appreciation to my supervisory panel – Ms. Nguyen Thu Huong, thank for your time, patience, guidance and understanding throughout the research. I also would like to send my sincere thank to all staff of Feretco Center to give me a greatest support during the time of doing this research.